Steve, I think this quote from more than 90 years ago that I posted in another thread yesterday basically sums it all up ...
Stringent rules prohibiting drugs in horse racing will always be in place -- but they will always be powerless to stamp it out.
Just as more tests will come with technology -- more ways to beat the system will come as well.
Like "Salvator" said 90 years ago -- horse racing will always have its "submerged tenth" just as society as a whole generally always does as well.